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NSAA Physics - Electricity and Magnetism Flashcards

6 cards from real NSAA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 NSAA Physics - Electricity and Magnetism flashcards as text

  1. A 10 Ω resistor carries 2 A of current. What power is dissipated?

    Answer: 40 W

    Power P = I²R = 4 × 10 = 40 W.

  2. A capacitor stores 0.01 C of charge at a potential difference of 5 V. What is its capacitance?

    Answer: 0.002 F

    Capacitance C = Q/V = 0.01/5 = 0.002 F.

  3. Which of the following best describes the direction of conventional current in a circuit?

    Answer: From positive to negative terminal

    By convention, current flows from the positive terminal of the source, through the circuit, to the negative terminal.

  4. A solenoid with 200 turns carries a current. Doubling the number of turns while keeping current constant will have what effect on the magnetic field inside?

    Answer: Double it

    The magnetic field inside a solenoid is B = μ₀nI, proportional to the number of turns per unit length, so doubling turns doubles B.

  5. A wire of length 0.5 m carrying 4 A is placed perpendicular to a magnetic field of 0.3 T. What force acts on it?

    Answer: 0.6 N

    F = BIL = 0.3 × 4 × 0.5 = 0.6 N.

  6. Which law states that the induced EMF in a circuit is proportional to the rate of change of magnetic flux?

    Answer: Faraday's Law

    Faraday's Law of electromagnetic induction states that EMF = -dΦ/dt.

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  1. esat-tmua.ac.uk — Late registration, registration deadline, fees, exam format, passing score, registration, score release, test dates, time limit, exam information · verified Oct 2026
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